Liquid-fuel furnace



May 27, 19 24.

1,495,860 J. G; MCKEAN ET AL LIQUID FUEL FURNACE Filed Sept. 30. 921 IIG.

Patented May 27, 1924;.

waste umreo is Tiaras frA rem orrrcn some enavns Manna-n, or MOUNT "VERNON. we noenn'r -.GLA;SGOW, SCOTLAND.

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IEEQU'ID F-U EL FURNACE.

Application filed September'30, 1921. .SerialNo. 504,311. A

" of the air supplied for combustion together with means for regulating the supply of air 'to the furnace in order to obtain complete combustion;

In order that our said invention and the manner :of carrying the same into effect or practice may be properly understood we have hereunto appended one sheet of explanatory drawings in.whic h, 7

Figure 1 is a front elevation of a liquid fuel furnace front as constructed according to this invention.

Figure 2 is :a sectional elevation taken on the 'line 22 of'Figure 1.

Figure 3 is a sectional elevation taken on the line of Figure 2 but with the furnace front plate removed.

Figure 4 is an elevation of the primary air trunk shown broken away, and illustrates a slightly modified shape for the vanes which are adapted to impart a swirling motion to the secondary air for complete com-' bustion. In this view two vanes only are shown one at right angles to the other so as to show their shape clearly.-

Referring to these drawings In carrying the improvements-of this in vention into effect or practice a primary air trunk a of less diameter than the opening 7) into the furnace is bell-mouthed at its forward end 0 to a diameter d greater than the opening 6 into thefurnace and is provided at its outer periphery with a sleeve extension 6 closed by an end plate 7 having a valve 9 for the admission of primary air. The liquid fuel atomizer it penetrates the end plate f and lies concentrically within the primary air trunk a; The air trunk a is arranged in such a manner that a circumferential space 7' is left between the bellmouthed termination 0 and the furnace front tial space 7'. t-rated by Figure l, radial vanes 70 shaped at k to the contour of the-bell-mouthed ;portion-c of the air-trunk a and deflected at screen plate 71.

plate for the admission of secondary lair. A series of vanesk adapted to di-rect the incoming secondary air tangentially to the longitudinal axis of the liquid fuel atomizer la. is provided round the said circumferen- Alternatively, and as illusthei r outlet edges 76 be employed. A cone shaped valve Z longitudinally movable on the sleeve extension 6 of the air trunka, by means of the handles m (Figure reg ulat-es the supply of secondary air. A comcal screen plate at is carried from the end plate f-of the air trunk a in such a manner that a circumferential space 0 is left between the furnace front plate i and the The furnace front plate 71 which is of conical. formation is dished i-nwardly towards the furnace and the screen plate a is dished outwardly so that the .space or chamber Io surrou-ndingthe air' trunk a increases in size longitudinally to the furnace as its diameter gets smaller. This construction besides stiffening the furnace front plate which forms the inner wall of the chamber or space 0 enablesythe circumferential area of thechamber 0' to'zbe approximately-constant for all distances from the vscenter so thatthe passage of secondary air screen plate 79 which extends outwardly I from the periphery of the cone-shaped valve Z. A 'cone-shaped baffle plate q arranged,

round the atomizer h is adapted to deflect the air entering through the valve 9.

The method of working" will be as fol lows Primary air is admitted by the atomizer h by means of the valve The secondary air is heated while passing between the screen plates n and 79 and the furnace front plate 2'. The secondary air is regulated by the cone-shaped valve and passing through the tangentially inclined vanes 70 is given a swirling motion andmixes with the atomized liquid fuel on its way to the furnace.

We claim.

' 1. A liquid fuel furnace front comprising a cylindrical wall arranged horizontally in front of and centrally in relation to the said cylindrical wall, and a plurality of vanes so arranged in the space between said inwardly projecting radial flange and the furnace front plate as to'impart to the air moving radially inwardly a movement in a circular or rotary direction; substantially as herein set forth.

' 2. A liquid fuel furnace front comprising a cylindrical wall arranged horizontally in front of and centrally in relation to the opening to the furnace in the front plate and of a diameter larger than the diameter of the said opening, an inwardly projecting radial flange at *the' inner termination of said cylindrical wall; a plurality of vanes so arranged in the space between said inwardly projecting radial flange and the furnace front plate as to impart to the air moving radially inwardly a movement in a circular or rotary direction, an air deflecting cy- 'lindrical wall of bell-mouth or curved shape so arranged in relation to said vanes that the a1r movlng circularly and radially 1nwardly has imparted to it a motion in a horizontal direction through the opening to the furnace; substantially as herein set forth.

3. A liquid fuel furnace front comprising a furnace-front plate of dished or conical form constituting the inner wall of a circumferential air space or chamber, a conical screen plate constituting the outer wall of said air space, said walls being oppositely dished, means for forming an air trunk centrally positioned within said air space, and means lncluded 111 said clrcumferential air space for successlvely imparting to the cured to the outer end of said cylinder, a-

sleeve valve for regulating 'the passage of air through the space between said cylinder flange and said front plate, and means included in said space for directing the air passing therethrough upon said inwardly curved portion in whirling motion.

5. In a liquid fuel furnace front, the combination with a fron't plate'hav-ing a fur-' nace opening therein, of a cylinder member of greater diameter than said furnace opening positioned in axial alignment therewith and spaced therefroim the inner end of'said cylinder member being provided with a flange terminating in an inwardly curved portion, the edge of which is of reduced diameter with respect to said furnace opening, a closure plate provided with air-control means and an atomizersecured to the outer end of said cylinder, a'sleeve'valve for regulating the passage of air through the space between said cylinder flange and said front plate, screen plates positioned immediately adjacent to said sleeve valve, and vanes positioned in said space for directing the air passing therethrough upon said inwardly curved portion in a whirling motion.

JOHN GRAVES MCKEAN. ROBERT FREDERICK JONES; 

